Importers of HS 3909.40 (phenolic resins) from Canada actually paid 0.22% on the taxed portion of the value in 2026-06 — 0.01% across everything shipped, taxed or not. Measured from official duty receipts, not the rulebook: the statutory MFN base rate on this code is 6.5%. Over the window the rate on the taxed portion moved 6.48% → 0.22%, with the largest single step -41.5pp in 2025-12. Measured from official US duty receipts · as-of 2026-06 · confidence: measured, not modelled. The HTS base rate is 6.5% — importers actually paid 0.22%, so the trade-war overlay added -6.3 pts, measured at the border (not a summed rulebook estimate). Reproduce exactly: tariff_story(hs: "3909.40", origin: "Canada") · see it at trimtabist.com/tariffs
HS 3909.40. The schedule base rate is 6.5%; importers from Canada actually paid 0.22% on the dutiable value in 2026-06 — the trade-war overlay added -6.3 points, measured at the border. Measured, not modelled.
Over the window the collected rate moved 6.48% (2023-07) → 0.22% (2026-06), largest single step -41.5pp in 2025-12.
7 Chapter-99 measures name Canada; scope mapping is partial (several annexes are PDFs) — absence never means exemption. They do not sum, and some are product-specific — the collected rate above is the composed truth.
All goods from Canada · the whole tariff ledger · reproduce: tariff_story(hs: "3909.40", origin: "Canada") via /connect. Not customs or legal advice.